2."DOOR" Circuit

Theory of the "DOOR" Circuit:

Providing that the 4 amp fuse, the 24 volt transformer, and the overloads (drive and blower) are okay, 24 A/ C volts will be supplied to the "COM" terminal of the door switch relay. This 24 volts is branched off through the lint drawer switch, and the two magnetic door switches to then supply the 24 volts to the coil of the door switch relay. The relay will now close sending the 24 A/C volts that was supplied to the "COM" terminal of the relay to the "N/O" terminal of that relay which in turn goes directly into the computer 15 pin connector #2.

Path of the "DOOR" Circuit:

The "DOOR" circuit in the AD-200 is different than other ADC dryers. This is a input circuit (24 A/C volts) into the computer pin #2. This is the control voltage that the computer will use to output at various times throughout the cycle to various components. The voltage will first start at the incoming voltage L1, L2, and L3, from there L1 and L3 travel through the two protection fuses (.5 amp slo-blo) to the ABC terminal block letters A and B. The voltage at this point is still 208/240 volts, here is where the 208/240 volts is cut down to 24 volt A/

C.One of the secondary wires gets grounded while the other one is fused with a 4 amp buss type fuse, and it's then present at terminal block "C". We should now be able to get the 24 volts A/C between terminal block "C" and ground. If the 24 volts is not present here then the problem could only be bad 4 amp fuse or the 24 volts transformer has failed. The 24 volts leaves "C" and travels through the blower and the drum overloads, this is the first place to check when the "DOOR" signal comes on the display when these overloads trip, it immediately displays "DOOR". The voltage now travels through some connectors (J1 and J3 pin #2 of each) and lands on terminal block #2, connecting point #2. This here is where the voltage will split. From here it will go to the door switch relay "com" terminal, and it will also travel through some connectors, see the diagram above for particular connectors and there pin#'s, and land on one terminal of the lint drawer switch. This is another spot to check if "DOOR" appears on the display. The voltage will then pass through the lint drawer switch, providing the lint drawer is closed, go through a few connectors (see above diagram) and land on one pin of the magnetic door switch. Here we use two magnetic type door switches. When the door is closed there are magnets on the door that should be adjusted so that when the door is closed the magnets are positioned above the pick-ups (door switches). The two magnetic proximity switches (door switches) are in series, they both need to sense the magnets or the voltage will stop here and read "DOOR". From the two door switches the voltage travels through a few more connectors (see above diagram) and it's final destination is one side of the coil of the door switch relay. The other side of this coil is hard wired to ground to complete this circuit.

66

Page 69 Page 71
Page 70
Image 70
American Dryer Corp AD-200 service manual Door Circuit Theory of the Door Circuit, Path of the Door Circuit
Page 69 Page 71

AD-200 specifications

The American Dryer Corp AD-200 is a renowned commercial dryer that stands out in the market for its efficiency, performance, and durability. Designed for high-demand environments such as laundromats, hotels, and gym facilities, the AD-200 delivers robust performance while maintaining user-friendly operation.

One of the standout features of the AD-200 is its capacity. With a generous drum size, this dryer can handle large loads, making it ideal for businesses with heavy laundry demands. This not only maximizes productivity but also allows users to process more laundry in less time, which is crucial in high-turnover environments.

The AD-200 employs advanced drying technologies that promote faster drying times while minimizing energy consumption. Its innovative airflow design ensures even heat distribution throughout the drum, allowing laundry to dry uniformly without hot or cold spots. This feature enhances drying efficiency and helps in preserving the quality of fabrics, reducing wear and tear over time.

Energy efficiency is a key characteristic of the AD-200. It is equipped with an EcoDry system that optimizes the drying process, significantly reducing operating costs. This technology monitors moisture levels in the drum and adjusts drying times accordingly. By preventing excess energy use, the EcoDry system not only helps in saving on utility bills but also aligns with environmentally responsible practices.

The AD-200 is built for reliability and longevity. Constructed with high-quality materials, it features a heavy-duty stainless steel drum that resists scratches, dents, and corrosion. Additionally, the unit’s design incorporates easy access for maintenance and service, which can drastically reduce downtime and operational disruptions.

In terms of user-friendliness, the AD-200 comes with a simple control interface that allows operators to select drying cycles with minimal effort. The intuitive controls and clear display make it accessible for all staff members. The dryer also includes adjustable drying times and temperatures, giving users flexibility to cater to different fabric care requirements.

Overall, the American Dryer Corp AD-200 is a steadfast solution for commercial laundry applications. Its combination of capacity, efficiency, and durability makes it a preferred choice among business owners looking to enhance their laundry operations while keeping costs manageable. With cutting-edge technology and user-centric design, the AD-200 stands as a reliable asset in the realm of commercial drying solutions.
Top Page Image Contents